On 72 MHz, the frequencies that were
designated by colored flags are no longer
legal to fly. On the numbered 72 MHz channels,
transmitters without a gold AMA sticker are
wide band and require that you take the
pins for the channel above and below (if
you club allows them at all).

As far as I know all 2.4 GHz and all ham
frequencies are fine. Also 27 MHz is
as fine as it ever was (or wasn't).

Jenny